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Electrical-conductivity polyurethane charging roller and preparation method thereof

A technology of polyurethane and electrical conductivity, applied in the field of conductive polyurethane charging roller and its preparation, can solve the problems of short service life, poor conductivity, poor mechanical properties and durability, etc., and achieve long service life, excellent processing performance and good mechanical performance. Effect

Active Publication Date: 2018-05-08
DONGGUAN WALTON RUBBER & PLASTIC NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing charging rollers have poor conductivity, poor mechanical properties and durability, and short service life

Method used

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  • Electrical-conductivity polyurethane charging roller and preparation method thereof
  • Electrical-conductivity polyurethane charging roller and preparation method thereof
  • Electrical-conductivity polyurethane charging roller and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A conductive polyurethane charging roller, comprising a roller shaft, a conductive polyurethane layer sleeved on the outside of the roller shaft; the conductive polyurethane layer is made of the following raw materials in parts by weight:

[0033]

[0034] The polyether polyol is a propylene glycol polyether with a molecular weight of 1200.

[0035] The polyether polyol has a functionality of 2, a hydroxyl value of 40 mgKOH / g, an acid value of 0.6 mgKOH / g, an amine value of 6 mgKOH / g, a dynamic viscosity of 4500 mPa.s, and a water content of ≤0.1%.

[0036] The isocyanate is toluene-2,4-diisocyanate.

[0037] The filler is heavy calcium carbonate with a particle size of 100 μm and treated with higher fatty acid salts.

[0038] The catalyst is composed of stannous octoate and A33 catalyst with a weight ratio of 8:2.

[0039] The silicone oil is methyl silicone oil, ethyl silicone oil or phenyl silicone oil.

[0040] A preparation method of a conductive polyurethane...

Embodiment 2

[0045] The difference between this embodiment and the above-mentioned embodiment 1 is that the conductive polyurethane layer is made of the following raw materials in parts by weight:

[0046]

[0047] The polyether polyol is a trimethylolpropane polyether with a molecular weight of 1000.

[0048] The polyether polyol has a functionality of 3, a hydroxyl value of 45 mgKOH / g, an acid value of 0.7 mgKOH / g, an amine value of 7 mgKOH / g, a dynamic viscosity of 4800 mPa.s, and a water content of ≤0.1%.

[0049] The isocyanate is toluene-2,4-diisocyanate.

[0050] The filler is heavy calcium carbonate with a particle size of 200 μm and treated with higher fatty acid salts.

[0051] The catalyst is composed of stannous octoate and A33 catalyst with a weight ratio of 8:2.5.

[0052] The silicone oil is methyl hydrogen silicone oil or methyl phenyl silicone oil.

Embodiment 3

[0054] The difference between this embodiment and the above-mentioned embodiment 1 is that the conductive polyurethane layer is made of the following raw materials in parts by weight:

[0055]

[0056] The polyether polyol is hydroxyl-terminated polytetrahydrofuran.

[0057] The polyether polyol has a functionality of 3, a hydroxyl value of 50 mgKOH / g, an acid value of 0.8 mgKOH / g, an amine value of 8 mgKOH / g, a dynamic viscosity of 5000 mPa.s, and a water content of ≤0.1%.

[0058] The isocyanate is toluene-2,4-diisocyanate.

[0059] The filler is heavy calcium carbonate with a particle size of 300 μm and treated with higher fatty acid salts.

[0060] The catalyst is composed of stannous octoate and A33 catalyst with a weight ratio of 8:3.

[0061] The silicone oil is methyl chlorophenyl silicone oil or methyl ethoxy silicone oil.

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Abstract

The invention relates to the technical field of charging roller, and in particular, relates to an electrical-conductivity polyurethane charging roller and a preparation method thereof; the electrical-conductivity polyurethane charging roller includes a roller shaft and an electrical conductive polyurethane layer sleeving the outer side of the roller shaft; the electrical conductive polyurethane layer is prepared from the following raw materials in parts by weight: 40-70 parts of polyether polyol, 25-45 parts of diisocyanate, 3-5 parts of a filler, 0.1-0.3 part of a catalyst, 0.5-0.9 part of silicone oil, 3-7 parts of dichloromethane, and 1-4 parts of water. The charging roller has the advantages of good electrical conductivity, good mechanical performance, good durability and long servicelife.

Description

technical field [0001] The invention relates to the technical field of charging rollers, in particular to a conductive polyurethane charging roller and a preparation method thereof. Background technique [0002] The charging roller used on the printing equipment is responsible for contacting and rotating the photosensitive drum, so that the photosensitive drum is evenly charged, and the electrostatic latent image after exposure is generated. The existing charging roller has poor conductivity, poor mechanical properties and durability, and short service life. Contents of the invention [0003] In order to overcome the shortcomings and deficiencies in the prior art, the object of the present invention is to provide a conductive polyurethane charging roller, which has good conductivity, good mechanical properties, good durability and long service life. [0004] Another object of the present invention is to provide a method for preparing a conductive polyurethane charging rol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/08C08L83/04C08K9/04C08K3/26C08G18/76C08G18/48C08G18/24C08G18/20G03G15/02
CPCC08G18/2063C08G18/244C08G18/48C08G18/7614C08K2003/265C08K2201/003C08L75/08C08L2201/08G03G15/0233C08L83/04C08K9/04C08K3/26
Inventor 黄本林李志刚罗兴亮杨树娟
Owner DONGGUAN WALTON RUBBER & PLASTIC NEW MATERIAL CO LTD
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